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FULL SCALE CAPACITY AT 460 VOLTS

The Range Finder Toroid has six motor size choices.
Select one that is equal or larger than your motor. This
will leave some headroom.

• For motors less than 5 HP (460 volt), take extra turns.
• For motors greater than 50 HP, use Range Finder

 Current Transformer.

MO TO R

FULL

% FULL

RANGE TURNS

CURRENT

SIZE

SCALE

LOAD

FINDER

TRANS-

CAPACITY

SWITCH

FO RMER

1/ 2 HP

.6 HP

123

2 O N

8

1

1.25

123

2 O N

4

1-1/ 2

1.65

109

2 O N

3

2

2.70

134

2 O N

2

3

3.80

128

3 O N

2

5

5.50

110

2 O N

1

7-1/ 2

8.25

110

3 O N

1

10

11.0

110

4 O N

1

15

27.5

183

5 O N

1

20

27.5

137

5 O N

1

25

27.5

110

5 O N

1

30

55.0

183

6 O N

1

40

55.0

138

6 O N

1

50

55.0

110

6 O N

1

60

84.0

140

1 O N

1

100:5

75

84.0

112

1 O N

1

100:5

100

130

130

1 O N

1

150:5

125

130

104

1 O N

1

150:5

150

173

115

1 O N

1

200:5

200

216

108

1 O N

1

250:5

250

260

104

1 O N

1

300:5

300

346

115

1 O N

1

400:5

MULTIPLIERS

For nominal voltages other than 460 volts,

multiply 460V full scale by:

208V = .45
230V = .5
380V = .83
415V = .9
575V = 1.25

For Kilowatts multiply Full Scale HP x .746

For motor sizes or capacities not in table:

% Full Load = Full Scale Capacity x 100

      

Your Motor Size

  +      -

4-20

MA OUTPUT

REMOTE RESET

REMOTE

RATE

RELAY OUTPUTS —
POWER ON, NOT TRIPPED

MAX

   TRIP

RATE

  TRIP

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

M

O

T

OR

RANGE FINDER

TOROID

CURRENT FROM
REMAINING PHASE

VOLTAGE TRANSFORMER
WITH 120V SECONDARY

MAX

FULL SCALE

 CAPACITY AT 460 VOLTS

MULTIPLIERS

Содержание ROC-50

Страница 1: ...ity it can be used Otherwise install a separate transformer It is okay if the secondary is grounded BE SURE TO NOTE WHICH TWO PHASES SUPPL YTHE TRANSFORMER In 120 208V three phase system the 120V MUST come from a transformer connected to two of the phases The 120V phase to ground voltage cannot be used CURRENT The current signal is taken from the REMAINING phase This current sample passes through ...

Страница 2: ...0 55 0 183 6 ON 1 40 55 0 138 6 ON 1 50 55 0 110 6 ON 1 60 84 0 140 1 ON 1 100 5 75 84 0 112 1 ON 1 100 5 100 130 130 1 ON 1 150 5 125 130 104 1 ON 1 150 5 150 173 115 1 ON 1 200 5 200 216 108 1 ON 1 250 5 250 260 104 1 ON 1 300 5 300 346 115 1 ON 1 400 5 MUL TIPLIERS For nominal voltages other than 460 volts multiply 460V full scale by 208V 45 230V 5 380V 83 415V 9 575V 1 25 For Kilowatts multipl...

Страница 3: ...nt Gold flashed contacts Reed Relays Mercury Switches 4 20 MILLIAMP ANAL OG OUTPUT The Analog Output is directly proportional to Full Scale capacity It is always active 500 ohm maximum con nected impedance Terminal 2 4 20mA Positive Terminal 3 4 20mA Negative Use twisted pair or in noisy environments use shielded cable Ground shield at other end Use the Full Scale capacity from the chart to scale ...

Страница 4: ...rip until the time is exceeded If t he trip condition goes away before the time is up the timer resets to zero ï Start with minimum Dela y If you are getting trips where you donít want them increase the Delay Time Adjusting R ate Set P oint The Rate Set Point limits sudden load changes 1 Fastest most sensitive 40 Slo west least sensitive Start at about 15 Go slo wer if you get nuisance trips Go fa...

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